Help your first grader explore the world of scientific measurement by "weighing" fruit with a "water scale"!

Do this experiment to help your first grader understand how salt can be removed from salt water. All it takes are a few household materials.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

Teach your child about using pumps to move water in this simple and educational preschool science activity!

In this science fair project, young children discover what happens when two fluids that have different densities get together.

Here's a classic celery science experiment that uses celery and food coloring to demonstrate how plants absorb water.

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

Water can go from solid to liquid to gas...but how does popcorn go from kernel to snack? Invite your first grade scientist to find out.

Here's a science activity that lets a first grader use an empty dish detergent bottle to create his own fountain as he explores air pressure.

Put a twist on traditional oil painting with this fun science activity that you and your first grader can do together.

This is a fun way to introduce kids to the concept of volume, and give them a quick hands-on activity to boot.

It's easier than you think to make homemade play dough -- just a few pantry staples makes a natural version of the toy that kids have loved for generations.

Your child might have noticed how bubbles quickly lose their colors and pop. Check out this creative way to make those bubbles last longer.

Think you can blow up a balloon without using your mouth? This isn't just a cool trick, it's also a great way to introduce chemistry and biology concepts.

Get your hands on a concoction that breaks the rules about what's a solid and what's a liquid.

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

This easy Halloween-themed science experiment for first-graders is perfect for chilly October afternoons or great as a Halloween party activity.

Explore solids and liquids with your young scientist by making gluep, a goopy substance that can behave like both a solid and a liquid!

Help your child explore chromatography, which is the process of separating colors or pigments, and create a neat art project in the process!

What's cooler than an explosion? Not much! This simple science experiment lets kids build their own pop rocket. So put on your safety goggles and let her rip.

Here's a fun math and science activity: help your child explore four different kinds of measurement, using their hand and a few simple household tools.

Take this "paper plate snack test" with your child for a hands-on lesson in making healthier choices to teach your child about what's in his food.

Teach your first grade scientist the difference between liquids and solids using maple syrup.

Your 1st grade scientist will improve her observation skills as she's encouraged to eat healthy by comparing the dry and fresh fruit in this experiment.

Make meringues with your first grader and see how states of matter can transform before your very eyes. Here's how:

Explore the scientific concept of capacity by seeing how many pennies you boat can hold before it sinks!

Is it solid or liquid? Create oobleck and witness the amazingly weird oscillation between the two!

Chemistry is a blast with this backyard bomb made from a sandwich bag. All you need are ingredients from the pantry to create a satisfying, and safe, explosion.

In this Halloween-themed activity, young learners will find out what happens when they mix two household items together to create a surprising chemical reaction.

Your kid will be captivated as she watches liquids change color before her very eyes during this fun science project that introduces some chemistry basics.